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Finding the Fourth Proportional to 138,710.88, 208,053.36 and 59,810.40

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Solution

The fourth proportional to 138,710.88, 208,053.36 and 59,810.40 is: 89,710.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,710.88 : 208,053.36 = 59,810.40 : x
  2. Step 2: Convert to fraction form
    138,710.88/208,053.36 = 59,810.40/x
  3. Step 3: Cross multiply
    138,710.88x = 208,053.36 × 59,810.40
  4. Step 4: Simplify right side
    138,710.88x = 12,443,754,682.94
  5. Step 5: Solve for x
    x = 12,443,754,682.94/138,710.88
  6. Step 6: Final answer
    x = 89,710.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.